Spot size reducer for standard single-mode fibers utilizing a graded-index fiber tip

Shiraishi, Kazuyuki; Ogura, Atsushi; Hiraguri, N.

doi:10.1049/cp:19971363

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2004

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“…A tapered SMF restricts its single-mode guiding properties to a limited wavelength region [7]. As the spot size of a tapered SMF is not proportional to the outer diameter of the tapered SMF, it is difficult to predict the linear relationship of the spot size and the beam divergence of a guided mode from the outer diameter of a tapered SMF [8,9]. Thus, in order to overcome these problems of the tapered SMF, a new mode conversion method using a tapered PCF was proposed.…”

Section: Introductionmentioning

confidence: 99%

Guiding Properties of a Tapered Photonic Crystal Fiber Compared with Those of a Tapered Single-Mode Fiber

Youk

Kim²,

Park

2004

Fiber and Integrated Optics

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We have fabricated tapered photonic crystal fibers using a fusion splicer and experimentally observed the near-field mode distribution and the beam divergence of it. We have also compared characteristics of the tapered photonic crystal fiber with those of a tapered standard single-mode fiber. Unlike a tapered standard single-mode fiber, the mode field profile of a tapered photonic crystal fiber shows a good confinement of its field within the core region. The numerical apertures of tapered photonic crystal fibers are increased as the diameter of the fiber is decreased.

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Section: Introductionmentioning

confidence: 99%